Class ZeroCopyBytes

Lib/test/picklecommon.py:308–334

class ZeroCopyBytes(bytes):
    readonly = True
    c_contiguous = True
    f_contiguous = True
    zero_copy_reconstruct = True

    def __reduce_ex__(self, protocol):
        if protocol >= 5:
            import pickle
            return type(self)._reconstruct, (pickle.PickleBuffer(self),), None
        else:
            return type(self)._reconstruct, (bytes(self),)

    def __repr__(self):
        return "{}({!r})".format(self.__class__.__name__, bytes(self))

    __str__ = __repr__

    @classmethod
    def _reconstruct(cls, obj):
        with memoryview(obj) as m:
            obj = m.obj
            if type(obj) is cls:
                # Zero-copy
                return obj
            else:
                return cls(obj)


class ZeroCopyBytearray(bytearray):